2015 Audi TT Electrical Switch & Relay Parts

Engine:
2.0L L4 Turbocharged

This page lists 68 electrical switch & relay parts for the 2015 Audi TT, across 17 part types, covering the 2.0L L4 Turbocharged engine. Every part shows its brand, manufacturer part number and fitment notes.

On the 2015 Audi TT, the switch and relay system covers the switches, relays and flashers that route power to everything the driver touches. Most of the listed parts are Oil Pressure Sender / Switch (29 parts), A/C Refrigerant Pressure Switch (6 parts) and Brake Light Switch (5 parts). The other 14 part types cover the remaining 28 parts.

A/C Condenser Fan Motor Relay

Brand Part Number Markets Notes Buy
HELLA 933332451
🇺🇸 US 🇨🇦 CA
4-pin connector
View on
Amazon

This table covers the relays that control the A/C Condenser Fan Motor circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is.

A/C Refrigerant Pressure Switch

Brand Part Number Markets Notes Buy
FOUR SEASONS Popular 20972
🇺🇸 US 🇨🇦 CA
Pressure Switch
Fitment notes — FOUR SEASONS 20972
Pressure Switch
Transducer
View on
Amazon
UAC Popular SW11103C
🇺🇸 US 🇨🇦 CA
Pressure Transducer
Fitment notes — UAC SW11103C
Pressure Transducer
with Rear A/CTransducer
View on
Amazon
DORMAN 904613
🇺🇸 US 🇨🇦 CA
View on
Amazon
GPD 1711653
🇺🇸 US 🇨🇦 CA
TT QuattroPressure Transducer
View on
Amazon
HOLSTEIN 2HPS0001
🇺🇸 US 🇨🇦 CA
View on
Amazon
VEMO V10730002
🇺🇸 US 🇨🇦 CA
Plug (Connector): 3 PinsThread Size: 7/16" 20 UNF Female
Fitment notes — VEMO V10730002
Plug (Connector): 3 PinsThread Size: 7/16" 20 UNF Female
TT Quattro
View on
Amazon

This table covers the pressure switches on the A/C circuit. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.

Accessory Power Relay

Brand Part Number Markets Notes Buy
HELLA 933332451
🇺🇸 US 🇨🇦 CA
4-pin connector
View on
Amazon
STANDARD MOTOR PRODUCTS RY577
🇺🇸 US 🇨🇦 CA
Functions: Fuel Pump Relay
Fitment notes — STANDARD MOTOR PRODUCTS RY577
Functions: Fuel Pump Relay
TT Quattro
View on
Amazon
WELLS 1R2303
🇺🇸 US 🇨🇦 CA
Mounting Hardware Included: No
Fitment notes — WELLS 1R2303
Mounting Hardware Included: No
TT Quattrowith 5 TerminalsRectangular
View on
Amazon

This table covers the relays that control the Accessory Power circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is.

Alternator / Generator Diode Relay

Brand Part Number Markets Notes Buy
STANDARD MOTOR PRODUCTS RY1981
🇺🇸 US 🇨🇦 CA
View on
Amazon

This table covers the relays that control the Alternator / Generator Diode circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is.

Back Up / Reverse Lamp Switch

Brand Part Number Markets Notes Buy
MARELLI CI51030
🇺🇸 US 🇨🇦 CA
View on
Amazon

This table covers the Back Up / Reverse Lamp switches. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.

Brake Light Switch

Economy

Brand Part Number Markets Notes Buy
VEMO V10730389
🇺🇸 US 🇨🇦 CA
TT Quattro
View on
Amazon

Standard Replacement

Brand Part Number Markets Notes Buy
STANDARD MOTOR PRODUCTS Popular SLS473
🇺🇸 US 🇨🇦 CA
View on
Amazon
FACET 71232
🇺🇸 US 🇨🇦 CA
TT Quattro
View on
Amazon
ROSTRA 620097
🇺🇸 US 🇨🇦 CA
View on
Amazon
WELLS 1S10862
🇺🇸 US 🇨🇦 CA
View on
Amazon

This table covers the pedal-mounted switch that turns on the brake lamps. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.

Clutch Pedal Position / Starter Safety Switch

Brand Part Number Markets Notes Buy
FACET 71309
🇺🇸 US 🇨🇦 CA
TT Quattro
View on
Amazon
STANDARD MOTOR PRODUCTS NS692
🇺🇸 US 🇨🇦 CA
Connector Gender: Female
Fitment notes — STANDARD MOTOR PRODUCTS NS692
Connector Gender: Female
TT Quattro
View on
Amazon
WELLS 1S16670
🇺🇸 US 🇨🇦 CA
TT Quattro
View on
Amazon

This table covers the Clutch Pedal Position / Starter Safety switches. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.

Fog / Driving Lamp Relay

Brand Part Number Markets Notes Buy
HELLA 933332451
🇺🇸 US 🇨🇦 CA
4-pin connector
View on
Amazon

This table covers the relays that control the Fog / Driving Lamp circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is.

Fuel Pump / Circuit Opening Relay

Brand Part Number Markets Notes Buy
HELLA 933332451
🇺🇸 US 🇨🇦 CA
4-pin connector
View on
Amazon

This table covers the relays that control the Fuel Pump / Circuit Opening circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is.

Horn Relay

Brand Part Number Markets Notes Buy
HELLA 965453801
🇺🇸 US 🇨🇦 CA
5-pin connector
View on
Amazon
VEMO V15710040
🇺🇸 US 🇨🇦 CA
Plug (Connector): 5 Pins
Fitment notes — VEMO V15710040
Plug (Connector): 5 Pins
Fits:
TT QuattroRelay No. 646Voltage: 12 VAmperage: 15 Aor TT QuattroVoltage: 12 VAmperage: 15 A
View on
Amazon
WELLS 1R2303
🇺🇸 US 🇨🇦 CA
Mounting Hardware Included: No
Fitment notes — WELLS 1R2303
Mounting Hardware Included: No
TT Quattro
View on
Amazon

This table covers the relays that control the Horn circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is.

HVAC Control Switch / Panel

Brand Part Number Markets Notes Buy
ULTRA-POWER 1711653
🇺🇸 US 🇨🇦 CA
Air Conditioning SwitchwithPRESSURE TRANSDUCER
View on
Amazon

This table covers the HVAC Control Switch panels.

Ignition Starter Switch

Economy

Brand Part Number Markets Notes Buy
SKP SKUS672
🇺🇸 US 🇨🇦 CA
TT Quattro
View on
Amazon
VEMO V15803229
🇺🇸 US 🇨🇦 CA
Plug (Connector): 6 Pins
Fitment notes — VEMO V15803229
Plug (Connector): 6 Pins
TT Quattro
View on
Amazon

Standard Replacement

Brand Part Number Markets Notes Buy
STANDARD MOTOR PRODUCTS Popular US672
🇺🇸 US 🇨🇦 CA
TT Quattro
View on
Amazon
ROSTRA 630052
🇺🇸 US 🇨🇦 CA
Key Type
View on
Amazon
WELLS 1S10953
🇺🇸 US 🇨🇦 CA
without keyless ignition system
View on
Amazon

This table covers the ignition switches that feed the starter circuit. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.

Multi-Function Relay

Brand Part Number Markets Notes Buy
BOSCH 0986AH0307
🇺🇸 US 🇨🇦 CA
Multi-Purpose Relay
Fitment notes — BOSCH 0986AH0307
Multi-Purpose Relay
TT Quattro30 Ampswith 5 Terminal Relay
View on
Amazon
WELLS 1R1007
🇺🇸 US 🇨🇦 CA
Mounting Hardware Included: No
View on
Amazon

This table covers the relays that control the Multi-Function circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is.

Oil Pressure Sender / Switch

Economy

Brand Part Number Markets Notes Buy
REIN Popular ELP0078
🇺🇸 US 🇨🇦 CA
TT QuattroBrown, with .55-.85 Bar
View on
Amazon
FAMOUS BRAND SBA1115
🇺🇸 US 🇨🇦 CA
Oil Pressure Sender or Switch2 PIN TERMINAL
View on
Amazon
HOLSTEIN 2OPS0070
🇺🇸 US 🇨🇦 CA
TTS Quattro
View on
Amazon
VEMO V15992000
🇺🇸 US 🇨🇦 CA
Thread Size: M10 X 10.55
Fitment notes — VEMO V15992000
Thread Size: M10 X 10.55Plug (Connector): 1 Pin0.85 BarColor-Brown
TT Quattro0.55-0.85 BAR
View on
Amazon
VEMO V10730084
🇺🇸 US 🇨🇦 CA
Plug (Connector): 1 Pin or 2 PinThread Size: M10 X 1
Fitment notes — VEMO V10730084
Plug (Connector): 1 Pin or 2 PinThread Size: M10 X 12.15 or 2.9 BarColor-Blue
TT Quattro2.15-2.95 BAR
View on
Amazon
VEMO V10540006
🇺🇸 US 🇨🇦 CA
TT Quattro
View on
Amazon
WALKER PRODUCTS 2561061
🇺🇸 US 🇨🇦 CA
TT QuattroBrown
View on
Amazon
WALKER PRODUCTS 2561033
🇺🇸 US 🇨🇦 CA
TT Quattro2.15-2.95 BAR
View on
Amazon
WALKER PRODUCTS 2561072
🇺🇸 US 🇨🇦 CA
TTS Quattro
View on
Amazon

Standard Replacement

Brand Part Number Markets Notes Buy
BECK/ARNLEY Popular 2011754
🇺🇸 US 🇨🇦 CA
TT Quattrowith Light
Fitment notes — BECK/ARNLEY 2011754
TT Quattrowith Light0.55-0.85 BAR
View on
Amazon
BECK/ARNLEY Popular 2011983
🇺🇸 US 🇨🇦 CA
TT Quattrowith Light
Fitment notes — BECK/ARNLEY 2011983
TT Quattrowith Light2.15-2.95 BAR
View on
Amazon
FACET Popular 70132
🇺🇸 US 🇨🇦 CA
TT Quattro0.55-0.85 BAR
View on
Amazon
HELLA Popular 008280001
🇺🇸 US 🇨🇦 CA
1-Pin ConnectorColor: Green or Brown
Fitment notes — HELLA 008280001
1-Pin ConnectorColor: Green or Brown
TT Quattro
View on
Amazon
HELLA Popular 008280031
🇺🇸 US 🇨🇦 CA
1-Pin ConnectorColor: Brown
Fitment notes — HELLA 008280031
1-Pin ConnectorColor: Brown
TT Quattro
View on
Amazon
BECK/ARNLEY 2011877
🇺🇸 US 🇨🇦 CA
TTS Quattrowith Light
View on
Amazon
FACET 70192
🇺🇸 US 🇨🇦 CA
TT Quattro2.15-2.95 BAR
View on
Amazon
HELLA 009600241
🇺🇸 US 🇨🇦 CA
1-Pin ConnectorColor: Black or Color: Blue
Fitment notes — HELLA 009600241
1-Pin ConnectorColor: Black or Color: Blue
TT QuattroNormally Closed Contact
View on
Amazon
HELLA 008280101
🇺🇸 US 🇨🇦 CA
2-Pin ConnectorColor: Black
Fitment notes — HELLA 008280101
2-Pin ConnectorColor: Black
TTS Quattro
View on
Amazon
ROSTRA 501285
🇺🇸 US 🇨🇦 CA
Fits TTS Quattroor TT Quattrowith 2 Pin Terminals
View on
Amazon
ROSTRA 501269
🇺🇸 US 🇨🇦 CA
TT Quattrowith Brown Connector
Fitment notes — ROSTRA 501269
TT Quattrowith Brown Connectorwith 1 Pin Terminals
View on
Amazon
STANDARD MOTOR PRODUCTS PS400
🇺🇸 US 🇨🇦 CA
Color: Brown, Silver
Fitment notes — STANDARD MOTOR PRODUCTS PS400
Color: Brown, Silver
TT Quattrowith Gauge
View on
Amazon
STANDARD MOTOR PRODUCTS PS443
🇺🇸 US 🇨🇦 CA
Black
Fitment notes — STANDARD MOTOR PRODUCTS PS443
Black
TTS Quattro
View on
Amazon
STANDARD MOTOR PRODUCTS PS489
🇺🇸 US 🇨🇦 CA
Terminal Quantity: 2
Fitment notes — STANDARD MOTOR PRODUCTS PS489
Terminal Quantity: 2
TT Quattrowith LightDark Blue
View on
Amazon
STANDARD MOTOR PRODUCTS PS665
🇺🇸 US 🇨🇦 CA
BlackColor: Green
Fitment notes — STANDARD MOTOR PRODUCTS PS665
BlackColor: Green
TT Quattrowith Lightwith Green Connector
View on
Amazon
WELLS 1S6875
🇺🇸 US 🇨🇦 CA
Connector Gender: Female
Fitment notes — WELLS 1S6875
Connector Gender: Female
TT Quattro0.55 - 0.85 BarBrownwith 1 Terminal(s)
View on
Amazon
WELLS 1S10846
🇺🇸 US 🇨🇦 CA
TTS Quattro1.20 - 1.60 Bar
Fitment notes — WELLS 1S10846
TTS Quattro1.20 - 1.60 BarBlackwith 2 Terminals
View on
Amazon
WELLS 1S12101
🇺🇸 US 🇨🇦 CA
TT Quattro2.15 - 2.95 Bar
Fitment notes — WELLS 1S12101
TT Quattro2.15 - 2.95 BarBluewith 1 Terminal(s)
View on
Amazon
Brand Part Number Markets Notes Buy
CALORSTAT OS3596
🇺🇸 US 🇨🇦 CA
View on
Amazon
HOLSTEIN 2OPS0303
🇺🇸 US 🇨🇦 CA
TT QuattroDark Blue
Fitment notes — HOLSTEIN 2OPS0303
TT QuattroDark Blue1 Blade Terminalwith Light
View on
Amazon

This table covers the senders and switches that report oil pressure to the gauge or lamp. Typical signs include a lamp that stays on, or a gauge that never moves. Confirm power and ground at the connector before replacing the sender or switch.

Outside Mirror Switch

Brand Part Number Markets Notes Buy
VEMO V10730340
🇺🇸 US 🇨🇦 CA
View on
Amazon

This table covers the Outside Mirror switches. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.

Power Window Switch

Economy

Brand Part Number Markets Notes Buy
VEMO V10730008
🇺🇸 US 🇨🇦 CA
RightTT Quattro
View on
Amazon

Standard Replacement

Brand Part Number Markets Notes Buy
ROSTRA 661151
🇺🇸 US 🇨🇦 CA
Front LeftTT Quattro
View on
Amazon
STANDARD MOTOR PRODUCTS DWS464
🇺🇸 US 🇨🇦 CA
RightTT Quattro
View on
Amazon
WELLS 1S13084
🇺🇸 US 🇨🇦 CA
Front RightTT Quattro
View on
Amazon

This table covers the switches that command each window motor. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.

Radiator Fan Relay

Brand Part Number Markets Notes Buy
HELLA 933332451
🇺🇸 US 🇨🇦 CA
4-pin connector
Fitment notes — HELLA 933332451
4-pin connector
Motor Relay
View on
Amazon

This table covers the relays that control the Radiator Fan circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is.

Buying Electrical Switch & Relay Parts for a 2015 Audi TT

On this vehicle, the switch and relay system covers the switches, relays and flashers that route power to everything the driver touches.

  • Confirm you have the 2.0L L4 Turbocharged engine — every part on this page is matched to it.
  • Read the notes on each row for position, trim and spec qualifiers before you order.
  • Where labor overlaps, inspect the connector terminals behind any failed switch — heat damage there will kill the new part too.
  • Cross-reference the manufacturer part number against your old part or a service-manual listing.

Start with the largest groups on this page: Oil Pressure Sender / Switch and A/C Refrigerant Pressure Switch .

Frequently Asked Questions

How many electrical switch & relay parts fit the 2015 Audi TT?

Our catalog currently lists 68 electrical switch & relay parts for the 2015 Audi TT across 17 subcategories and 20 brands, covering the 2.0L L4 Turbocharged engine. Each part is matched to the engine(s) it fits.

What are the signs of electrical switch & relay problems on a 2015 Audi TT?

Common symptoms include accessories that work intermittently, a click without action, or one function dead while its fuse tests fine. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.

What should I replace at the same time?

Where labor overlaps, inspect the connector terminals behind any failed switch — heat damage there will kill the new part too.

What do the market flags (US, CA, MX) on each part mean?

They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 2015 Audi TT was originally sold in the US, the safest choice is a part marked for the US market.

How do I make sure a part fits my 2015 Audi TT?

Every part on this page is matched to the 2.0L L4 Turbocharged engine. Then swap a suspect relay with an identical known-good one from the fuse box before buying — it is the fastest diagnostic there is. The notes column carries position and trim qualifiers where they apply.

Other Parts for the 2015 Audi TT

Electrical Switch & Relay Parts for Other Audi TT Years

Switch vehicle or jump to a subcategory

Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.